Hi @Gabriel23717186abix ,
after tinkering a bit with a table in InDesign 18.1 I can reproduce the bug!
Or at least I can make the footnote references go away. Not exactly the same what you are showing in your video.
When I apply the Adobe World-Ready Single-line Composer or the Adobe World-Ready Composer to the text of the table the footnote references simply vanish.
At the top the table text is formatted with the Adobe World-Ready Composer, at the bottom it's the Adobe Composer:

Attached the InDesign document:
BUG-Composer-FootnotesDisappearInTable-v18.1.indd
Regards,
Uwe Laubender
( Adobe Community Expert )
